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“BACKGROUND Recent studies suggest that there might be an association between albuterol use and worsening asthma in patients homozygous for arginine (Arg/Arg) at codon 16 of the beta-receptor.”
The Journal of allergy and clinical immunology • 2006 | View Paper
“Results: During the 16-week treatment period, patients homozygous for arginine (Arg/Arg) at β2-AR-16 who used albuterol regularly had a small decline in morning peak expiratory flow (AM PEF).”